Show HN: Delete Facebook "friends" you don't actually talk to
dusterapp.com
dusterapp.com
Also I think you misunderstand how some people use facebook. I use it as a long memory, address book, and passive way to keep in touch with a wide crowd. It's value is in that when I met people I can just add them and forget about it until even years down the road I might be like "oh I know a person" and then have easy access to get in touch with them (and even passively gotten to know a bit about them)
This reminds me of when Facebook used to put up notices like "You haven't talked to [wife] in awhile! Click here to post on her wall!"
https://www.facebook.com/friends/organize
This also has the advantage of avoiding the social awkwardness of "why'd you unfriend me".
I'm sure there's a reason for it, but if clicking "dust" would actually remove them instead of bringing up the page where I could remove them, this app would be about 100x more valuable to me.